218 lines
		
	
	
		
			7.2 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			218 lines
		
	
	
		
			7.2 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/* crypto/o_time.c -*- mode:C; c-file-style: "eay" -*- */
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/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
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 * project 2001.
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 */
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/* ====================================================================
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 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer. 
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 *
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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#include <openssl/e_os2.h>
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#include <string.h>
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#include "o_time.h"
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#ifdef OPENSSL_SYS_VMS
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# include <libdtdef.h>
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# include <lib$routines.h>
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# include <lnmdef.h>
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# include <starlet.h>
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# include <descrip.h>
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# include <stdlib.h>
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#endif
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struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
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	{
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	struct tm *ts = NULL;
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#if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_SYS_OS2) && !defined(__CYGWIN32__) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX) && !defined(OPENSSL_SYS_SUNOS)
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	/* should return &data, but doesn't on some systems,
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	   so we don't even look at the return value */
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	gmtime_r(timer,result);
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	ts = result;
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#elif !defined(OPENSSL_SYS_VMS)
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	ts = gmtime(timer);
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	if (ts == NULL)
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		return NULL;
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	memcpy(result, ts, sizeof(struct tm));
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	ts = result;
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#endif
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#ifdef OPENSSL_SYS_VMS
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	if (ts == NULL)
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		{
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		static $DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
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		static $DESCRIPTOR(lognam,"SYS$TIMEZONE_DIFFERENTIAL");
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		char logvalue[256];
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		unsigned int reslen = 0;
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		struct {
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			short buflen;
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			short code;
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			void *bufaddr;
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			unsigned int *reslen;
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		} itemlist[] = {
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			{ 0, LNM$_STRING, 0, 0 },
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			{ 0, 0, 0, 0 },
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		};
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		int status;
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		time_t t;
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		/* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
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		itemlist[0].buflen = sizeof(logvalue);
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		itemlist[0].bufaddr = logvalue;
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		itemlist[0].reslen = &reslen;
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		status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
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		if (!(status & 1))
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			return NULL;
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		logvalue[reslen] = '\0';
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		t = *timer;
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/* The following is extracted from the DEC C header time.h */
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/*
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**  Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
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**  have two implementations.  One implementation is provided
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**  for compatibility and deals with time in terms of local time,
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**  the other __utc_* deals with time in terms of UTC.
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*/
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/* We use the same conditions as in said time.h to check if we should
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   assume that t contains local time (and should therefore be adjusted)
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   or UTC (and should therefore be left untouched). */
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#if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
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		/* Get the numerical value of the equivalence string */
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		status = atoi(logvalue);
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		/* and use it to move time to GMT */
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		t -= status;
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#endif
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		/* then convert the result to the time structure */
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		/* Since there was no gmtime_r() to do this stuff for us,
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		   we have to do it the hard way. */
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		{
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		/* The VMS epoch is the astronomical Smithsonian date,
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		   if I remember correctly, which is November 17, 1858.
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		   Furthermore, time is measure in thenths of microseconds
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		   and stored in quadwords (64 bit integers).  unix_epoch
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		   below is January 1st 1970 expressed as a VMS time.  The
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		   following code was used to get this number:
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		   #include <stdio.h>
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		   #include <stdlib.h>
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		   #include <lib$routines.h>
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		   #include <starlet.h>
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		   main()
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		   {
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		     unsigned long systime[2];
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		     unsigned short epoch_values[7] =
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		       { 1970, 1, 1, 0, 0, 0, 0 };
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		     lib$cvt_vectim(epoch_values, systime);
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		     printf("%u %u", systime[0], systime[1]);
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		   }
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		*/
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		unsigned long unix_epoch[2] = { 1273708544, 8164711 };
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		unsigned long deltatime[2];
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		unsigned long systime[2];
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		struct vms_vectime
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			{
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			short year, month, day, hour, minute, second,
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				centi_second;
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			} time_values;
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		long operation;
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		/* Turn the number of seconds since January 1st 1970 to
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		   an internal delta time.
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		   Note that lib$cvt_to_internal_time() will assume
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		   that t is signed, and will therefore break on 32-bit
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		   systems some time in 2038.
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		*/
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		operation = LIB$K_DELTA_SECONDS;
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		status = lib$cvt_to_internal_time(&operation,
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			&t, deltatime);
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		/* Add the delta time with the Unix epoch and we have
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		   the current UTC time in internal format */
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		status = lib$add_times(unix_epoch, deltatime, systime);
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		/* Turn the internal time into a time vector */
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		status = sys$numtim(&time_values, systime);
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		/* Fill in the struct tm with the result */
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		result->tm_sec = time_values.second;
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		result->tm_min = time_values.minute;
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		result->tm_hour = time_values.hour;
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		result->tm_mday = time_values.day;
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		result->tm_mon = time_values.month - 1;
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		result->tm_year = time_values.year - 1900;
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		operation = LIB$K_DAY_OF_WEEK;
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		status = lib$cvt_from_internal_time(&operation,
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			&result->tm_wday, systime);
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		result->tm_wday %= 7;
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		operation = LIB$K_DAY_OF_YEAR;
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		status = lib$cvt_from_internal_time(&operation,
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			&result->tm_yday, systime);
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		result->tm_yday--;
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		result->tm_isdst = 0; /* There's no way to know... */
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		ts = result;
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		}
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		}
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#endif
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	return ts;
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	}	
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